Mila and Ashton 'delay wedding'

Ashton Kutcher and Mila Kunis have apparently put their wedding off for a year.

The pair have been engaged since February and Mila is currently pregnant with their first child. With their new arrival on the way, it's thought plans to tie the knot have been put on the backburner.

“The wedding will be next July,” a source told RadarOnline. “They want to focus on their daughter first and having it next summer seems logical.”

It's the first marriage for Mila, 30, who previously said saying vows wasn't important to her. For 36-year-old Ashton it's the second time, following his divorce from Demi Moore, 51, last year.

Mila and Ashton met on the set of That '70s Show in 1998 but their friendship didn't develop into romance until 2012.

“They won’t have a big production but it will be elaborate. The wedding party will consist of the cast of That '70s Show as they are all very close. They still hang out with the original cast all the time. Most likely Danny Masterson will be the best man because him and Ashton are like brothers,” the insider divulged.

Apparently Ashton's family is a huge fan of Mila and are glad they keep each other "grounded".

And it looks like baby number one is just the beginning for the pair.

“They both want a large family and want to start on their next kid shortly after they tie the knot. They are soul mates and know that they will be together forever,” the source said.